The railway bridge in Demir Kapija which bridges the river Doshnica and the river Boshava before the flow in the river Vardar is a masterpiece of the iron construction made ​​in 1882 in the German units of KRUP, Vestvalija – Dortmund. The reconstruction of the factory plant is made with ironworks from Vitikovce in the Czech Republic in 1929. The bridge exist today, the railway traffic goes through the bridge.